Issue 1/2017, 23. Volume Page 28–46
It’s all about validity: Preparing TIMSS and PIRLS background questionnaires for the 21st century
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International large-scale assessments are facing several challenges: it is expected that they deliver reliable and comparable information on different levels of educational systems as well as documenting the situation of educational systems every few years as trend information over time. This means that the instruments used to gather the information need to be adapted to actual situations in each cycle of the study as well as focusing on information that is sufficiently important for trend observations over the different cycles. In order to gather actual information as well as assessing reliable and valid information over time, this involves walking on a tightrope. The challenge here is to predict what is currently important and what will also be relevant in the future.